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Dispersion-free quantum clock synchronization via fiber link |
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| Authors: | Fei-yan Hou Rui-fang Dong Run-ai Quan Yu Zhang Yun Bai Tao Liu Shou-gang Zhang Tong-yi Zhang |
| Institution: | 1. Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xian 710600, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;3. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian 710119, China |
| Abstract: | We proposed a fiber-based quantum clock synchronization protocol by employing the dispersion cancellation feature of the frequency anti-correlated entangled source under the quantum interference measurement. It is shown that, the accuracy of the synchronization is mainly dependent on the bandwidth of the frequency entangled biphoton spectrum and on the temperature variation induced fluctuations in both the reference fiber coiling and the fiber link. With this proposal, synchronization between two clocks at a distance of ten kilometers can be implemented with an accuracy below a picosecond. |
| Keywords: | Frequency anti-correlated entanglement Dispersion-free Quantum clock synchronization via fiber link |
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